conditions.go

/*
* conditions.go
*
* This file is part of wu.  It contains functions related to
* the -conditions switch (current conditions).
*
* Written and maintained by Stephen Ramsay <sramsay.unl@gmail.com>
* and Anthony Starks.
*
* Last Modified: Wed Dec 18 16:11:11 CST 2013
*
* Copyright © 2010-2014 by Stephen Ramsay and Anthony Starks.
*
* wu is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* wu is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
* License for more details.
*
* You should have received a copy of the GNU General Public License
* along with wu; see the file COPYING.  If not see
* <http://www.gnu.org/licenses/>.
 */

package main

import (
  "fmt"
  "regexp"
	"strconv"
	"strings"
)


type Conditions struct {
  Current_observation Current
}

type Current struct {
  Observation_time     string
  Observation_location Location
  Station_id           string
  Weather              string
  Temperature_string   string
  Relative_humidity    string
  Wind_string          string
  Pressure_mb          string
  Pressure_in          string
  Pressure_trend       string
  Dewpoint_string      string
  Heat_index_string    string
  Windchill_string     string
  Visibility_mi        string
  Precip_today_string  string
}

type Location struct {
  Full string
}

// printConditions prints the conditions to standard output
func PrintConditions(obs *Conditions) {
  current := obs.Current_observation
  fmt.Printf("Current conditions at %s (%s)\n%s\n",
    current.Observation_location.Full, current.Station_id, current.Observation_time)
  fmt.Println("   Temperature:", current.Temperature_string)
  if current.Heat_index_string != "NA" {
    fmt.Println("   Heat Index: ", current.Heat_index_string)
  }
  fmt.Println("   Sky Conditions:", current.Weather)
  fmt.Println("   Wind:", current.Wind_string)
  pstring := fmt.Sprintf("   Pressure: %s in (%s mb) and", current.Pressure_in, current.Pressure_mb)
  switch current.Pressure_trend {
  case "+":
    fmt.Println(pstring, "rising")
  case "-":
    fmt.Println(pstring, "falling")
  case "0":
    fmt.Println(pstring, "holding steady")
  }
  fmt.Println("   Relative humidity:", current.Relative_humidity)
	fmt.Print("   Dewpoint: ", current.Dewpoint_string)
	dp_components := strings.Split(current.Dewpoint_string, " ")
	dp, _ := strconv.Atoi(dp_components[0])
	if dp < 50 {
		fmt.Println(" (dry)")
	} else if dp >= 50 && dp <= 54 {
			fmt.Println(" (very comfortable)")
	} else if dp >= 55 && dp <= 59 {
			fmt.Println(" (comfortable)")
	} else if dp >= 60 && dp <= 64 {
			fmt.Println(" (okay for most)")
	} else if dp >= 65 && dp <= 69 {
			fmt.Println(" (somewhat uncomfortable)")
	} else if dp >= 70 && dp <= 74 {
			fmt.Println(" (very humid)")
	} else if dp >= 75 && dp <= 80 {
			fmt.Println(" (oppressive)")
	} else if dp >= 80 {
			fmt.Println(" (dangerously high)")
		}
  if current.Windchill_string != "NA" {
    fmt.Println("   Windchill: ", current.Windchill_string)
  }
  fmt.Printf("   Visibility: %s miles\n", current.Visibility_mi)
  if m, _ := regexp.MatchString("0.0", current.Precip_today_string); !m {
    fmt.Println("   Precipitation today: ", current.Precip_today_string)
  }
}